Condenser



Aug. 29, 1933. w, J, HOMER 1,924,435

CONDENSER Filed Feb. 12, 1932 Inuen F William J. Homer Patented Aug. 29,1933 UNITED STATES PATENT OFFICE mesne assignments, to AssociatedElectric Laboratories, Inc., Chicago, 111., a corporation of DelawareApplication February 12, 1932. Serial No. 592,502

2 Claims.

This invention relates in general to sealed condensers and to animproved method of insulating and sealing the condenser units in theircontainers, which improved method consists in 5 the formation of a layerof insulating material on the inside of the'container before insertionof the condenser therein.

The usual condenser such as known especially to the telephone artcomprises strips of conducting foil or the like and strips of paper orother insulating material wound in a roll and having terminalsprojecting therefrom, connected to the strips of foil.

In mounting and sealing such condensers it is essential that there be nopossibility of the condenser unit touching the metal container. This isusually accomplished by dipping the condenser unit in wax or some otherinsulating compound and allowing it to obtain a coating of the compoundbefore placing it in the container. The remaining space between thecondenser unit and the container is then filled with more of theinsulating compound.

The object of this invention is, therefore, to provide an improvedmethod for presealing a condenser container in such a manner thatcontact in assembly between the condenser and the container isprevented, in addition to the sealing of any possible small openings inthe container.

Details of my invention are shown in the ac companying diagrams inwhich:

Fig. 1 shows a section of a container 6 for a condenser, having itsentire inner surface covered with a layer 2 of wax or other insulatingcompound as prepared to receive the condenser unit.

Fig. 2 shows a section through the assembly with the condenser unit 3 inplace.

In practicing my invention I cause the layer of insulating compound tobe deposited on the inside of the container by solidification from themelted state. This is brought about by having the container at atemperature below the melting point of the insulating compound thenbringing the melted compound into contact with its inner surface. Iprefer to accomplish this by pouring the container full of the meltedcompound, allowing it to remain long enough for only a portion of thecompound to solidify, then pouring out the remainder. I do not if ah tolimit myself to forming the coating in thi.. manner since there areother means for accomplishing the same result, such as holding thecontainer over a jet of the melted compound. A

layer 2 of insulating compound, of any desired thickness may bedeposited inside of the container 6. This layer serves the purpose ofsealing any small openings in the container as well as preventingcontact between the condenser unit and the container. I

Into the container prepared as above I place the condenser unit 3 thenfill the remaining space with more of the insulating compound 7 so thatonly the terminals 4 project from the compound. This additional compoundblends with the coating 2 of the container to effectively seal thecondenser in the container. After the addition of the compound '7, thecover 5 with holes for the terminals 4 is placed on the open end of thecontainer and pressed down into contact with the compound 7.

What is claimed is:

1. The method of sealing a condenser unit in a container which consistsin filling the container with melted insulating compound, allowing partof the compound to congeal, removing the compound which is still liquidafter a layer of the compound of the desired thickness has becomecongealed over the entire inner surface of the container, and of thenplacing the condenser unit in the container and pouring meltedinsulating compound into the remaining space so that it blends with thelayer of compound attached to the container to seal the condenser in thecontainer.

2. The method of insulating a condenser unit from its container whichcomprises, filling the container with melted insulating compound,allowing the compound to congeal around the entire inner surface of thecontainer for a time dependent on the thickness of the layer desired,removing the compound not yet congealed, and of then placing thecondenser unit in said container and filling the remaining space withinsulating compound.

WILLIAM J. HOMER.

